INDEX 311 



Embryo 222 



Embryology, experimental 219-221 



Empedocles 199 



Enderlein 15 



Energy and light 97 



and mass 75, 291 



changes in atom 97 



deBnition of 291 



free 285 



-levels in atom 96, 97 



Enzymes 55, 56 



Epstein, Paul S 299 



Euler, Hans von 56 



Evolution 73, 183, 211-214, 243 



ideas of 199 



of species, idea of the 198 



founder of modern theory of 199 



Ewald, P. P 75 



Excitations and galvanometric deflections 57 



Experimental abiogenesis and the Gaskell theory 180, 181, 272 



embryology 219-221 



method 26, 27 



Fajans, Kasimir 78 



Faraday, Michael 285, 290 



Faraday's law of electrical equivalence 291 



laws 70 



Fere, Charles S 57 



Fertilization 218, 219, 223, 226, 229, 230, 231 



theory of 183, 184, 185 



Fischer. Emil 296 



Eugen 231 



Martin H 62, 71 



Fiske, John 25. 157 



Fixity of species 206-208, 242, 243 



Fodor, Andor 56 



Foote, Paul D 299 



Franck, J 94, 299 



Franklin, Benjamin 289 



Freundlich, Herbert 70. 71 



Fritsch, Gustav 201, 202 



Galilei 213 



